<template>
	<view class="content">
		<view class="navbar" :style="{position:headerPosition,top:headerTop}">
			<view class="nav-item" :class="{current: filterIndex === 0}" @click="tabClick(0)">
				综合排序
			</view>
			<view class="nav-item" :class="{current: filterIndex === 1}" @click="tabClick(1)">
				销量优先
			</view>
			<view class="nav-item" :class="{current: filterIndex === 2}" @click="tabClick(2)">
				<text>价格</text>
				<view class="p-box">
					<text :class="{active: priceOrder === 1 && filterIndex === 2}" class="yticon icon-shang"></text>
					<text :class="{active: priceOrder === 2 && filterIndex === 2}" class="yticon icon-shang xia"></text>
				</view>
			</view>
			<text class="cate-item yticon icon-fenlei1" @click="toggleCateMask('show')"></text>
		</view>
		<view class="goods-list">
			<view v-for="(item, index) in productList" :key="index" class="goods-item" @click="navToDetailPage(item)">
				<view class="image-wrapper">
					<image :src="item.pic" mode="aspectFill"></image>
				</view>
				<text class="title clamp">{{item.name}}</text>
				<text class="title2">{{item.subTitle}}</text>
				<view class="price-box">
					<text class="price">{{item.price}}</text>
					<text>已售 {{item.sale}}</text>
				</view>
			</view>
		</view>
		<uni-load-more :status="loadingType"></uni-load-more>

		<view class="cate-mask" :class="cateMaskState===0 ? 'none' : cateMaskState===1 ? 'show' : ''" @click="toggleCateMask">
			<view class="cate-content" @click.stop.prevent="stopPrevent" @touchmove.stop.prevent="stopPrevent">
				<scroll-view scroll-y class="cate-list">
					<view v-for="item in cateList" :key="item.id">
						<view class="cate-item b-b two">{{item.name}}</view>
						<view v-for="tItem in item.children" :key="tItem.id" class="cate-item b-b" :class="{active: tItem.id==searchParam.productCategoryId}"
									@click="changeCate(tItem)">
							{{tItem.name}}
						</view>
					</view>
				</scroll-view>
			</view>
		</view>

	</view>
</template>

<script>
import {
	searchProductList,
	fetchCategoryTreeList
} from '@/api/product.js';
import uniLoadMore from '@/components/uni-load-more/uni-load-more.vue';
import {fetchSearchProduct} from "../../api/product";
export default {
	components: {
		uniLoadMore
	},
	data() {
		return {
			keywords: '',
			cateMaskState: 0, //分类面板展开状态
			headerPosition: "fixed",
			headerTop: "0px",
			loadingType: 'more', //加载更多状态
			filterIndex: 0,
			priceOrder: 0, //1 价格从低到高 2价格从高到低
			cateList: [],
			productList: [],
			searchParam: {
				productCategoryId: null,
				pageNum: 1,
				pageSize: 6,
				sort: 0
			}
		};
	},

	onLoad(options) {
		this.loaded = true;
		let keywords = options.keywords;
		fetchSearchProduct(keywords).then(response => {
			this.productList = response.rows;
			this.initBrandAttention();
		});
		this.keywords = keywords;
		this.loadData('refresh');

		// #ifdef H5
		this.headerTop = document.getElementsByTagName('uni-page-head')[0].offsetHeight + 'px';
		// #endif
		this.searchParam.productCategoryId = options.sid;
		this.loadCateList(options.fid, options.sid);
		this.loadData();
	},
	onPageScroll(e) {
		//兼容iOS端下拉时顶部漂移
		if (e.scrollTop >= 0) {
			this.headerPosition = "fixed";
		} else {
			this.headerPosition = "absolute";
		}
	},
	//下拉刷新
	onPullDownRefresh() {
		this.loadData('refresh');
	},
	//加载更多
	onReachBottom() {
		this.searchParam.pageNum++;
		this.loadData();
	},
	methods: {
		//加载分类
		async loadCateList(fid, sid) {
			fetchCategoryTreeList().then(response => {
				this.cateList = response.data;
			})
		},
		//加载商品 ，带下拉刷新和上滑加载
		async loadData(type = 'add', loading) {
			//没有更多直接返回
			if (type === 'add') {
				if (this.loadingType === 'nomore') {
					return;
				}
				this.loadingType = 'loading';
			} else {
				this.loadingType = 'more'
			}

			if (type === 'refresh') {
				this.searchParam.pageNum=1;
				this.productList = [];
			}
			if(this.filterIndex==0){
				this.searchParam.sort=0;
			}
			if (this.filterIndex === 1) {
				this.searchParam.sort = 2;
			}
			if (this.filterIndex === 2) {
				if (this.priceOrder == 1) {
					this.searchParam.sort = 3;
				} else {
					this.searchParam.sort = 4;
				}
			}
			fetchSearchProduct(this.keywords).then(response => {
				let productList = response.rows;
				if (response.rows.length === 0) {
					//没有更多了
					this.loadingType = 'nomore';
					this.searchParam.pageNum--;
				} else {
					if (response.rows.length < this.searchParam.pageSize) {
						this.loadingType = 'nomore';
						this.searchParam.pageNum--;
					} else {
						this.loadingType = 'more';
					}
					this.productList = this.productList.concat(productList);
				}
				if (type === 'refresh') {
					if (loading == 1) {
						uni.hideLoading()
					} else {
						uni.stopPullDownRefresh();
					}
				}
			});
		},
		//筛选点击
		tabClick(index) {
			if (this.filterIndex === index && index !== 2) {
				return;
			}
			this.filterIndex = index;
			if (index === 2) {
				this.priceOrder = this.priceOrder === 1 ? 2 : 1;
			} else {
				this.priceOrder = 0;
			}
			uni.pageScrollTo({
				duration: 300,
				scrollTop: 0
			})
			this.loadData('refresh', 1);
			uni.showLoading({
				title: '正在加载'
			})
		},
		//显示分类面板
		toggleCateMask(type) {
			let timer = type === 'show' ? 10 : 300;
			let state = type === 'show' ? 1 : 0;
			this.cateMaskState = 2;
			setTimeout(() => {
				this.cateMaskState = state;
			}, timer)
		},
		//分类点击
		changeCate(item) {
			this.searchParam.productCategoryId = item.id;
			this.toggleCateMask();
			uni.pageScrollTo({
				duration: 300,
				scrollTop: 0
			})
			this.loadData('refresh', 1);
			uni.showLoading({
				title: '正在加载'
			})
		},
		//详情
		navToDetailPage(item) {
			let id = item.id;
			uni.navigateTo({
				url: `/pages/product/product?id=${id}`
			})
		},
		stopPrevent() {}
	},
}
</script>

<style lang="scss">
page,
.content {
	background: $page-color-base;
}

.content {
	padding-top: 96upx;
}

.navbar {
	position: fixed;
	left: 0;
	top: var(--window-top);
	display: flex;
	width: 100%;
	height: 80upx;
	background: #fff;
	box-shadow: 0 2upx 10upx rgba(0, 0, 0, .06);
	z-index: 10;

	.nav-item {
		flex: 1;
		display: flex;
		justify-content: center;
		align-items: center;
		height: 100%;
		font-size: 30upx;
		color: $font-color-dark;
		position: relative;

		&.current {
			color: $base-color;

			&:after {
				content: '';
				position: absolute;
				left: 50%;
				bottom: 0;
				transform: translateX(-50%);
				width: 120upx;
				height: 0;
				border-bottom: 4upx solid $base-color;
			}
		}
	}

	.p-box {
		display: flex;
		flex-direction: column;

		.yticon {
			display: flex;
			align-items: center;
			justify-content: center;
			width: 30upx;
			height: 14upx;
			line-height: 1;
			margin-left: 4upx;
			font-size: 26upx;
			color: #888;

			&.active {
				color: $base-color;
			}
		}

		.xia {
			transform: scaleY(-1);
		}
	}

	.cate-item {
		display: flex;
		justify-content: center;
		align-items: center;
		height: 100%;
		width: 80upx;
		position: relative;
		font-size: 44upx;

		&:after {
			content: '';
			position: absolute;
			left: 0;
			top: 50%;
			transform: translateY(-50%);
			border-left: 1px solid #ddd;
			width: 0;
			height: 36upx;
		}
	}
}

/* 分类 */
.cate-mask {
	position: fixed;
	left: 0;
	top: var(--window-top);
	bottom: 0;
	width: 100%;
	background: rgba(0, 0, 0, 0);
	z-index: 95;
	transition: .3s;

	.cate-content {
		width: 630upx;
		height: 100%;
		background: #fff;
		float: right;
		transform: translateX(100%);
		transition: .3s;
	}

	&.none {
		display: none;
	}

	&.show {
		background: rgba(0, 0, 0, .4);

		.cate-content {
			transform: translateX(0);
		}
	}
}

.cate-list {
	display: flex;
	flex-direction: column;
	height: 100%;

	.cate-item {
		display: flex;
		align-items: center;
		height: 90upx;
		padding-left: 30upx;
		font-size: 28upx;
		color: #555;
		position: relative;
	}

	.two {
		height: 64upx;
		color: #303133;
		font-size: 30upx;
		background: #f8f8f8;
	}

	.active {
		color: $base-color;
	}
}

/* 商品列表 */
.goods-list {
	display: flex;
	flex-wrap: wrap;
	padding: 0 30upx;
	background: #fff;

	.goods-item {
		display: flex;
		flex-direction: column;
		width: 48%;
		padding-bottom: 40upx;

		&:nth-child(2n+1) {
			margin-right: 4%;
		}
	}

	.image-wrapper {
		width: 100%;
		height: 330upx;
		border-radius: 3px;
		overflow: hidden;

		image {
			width: 100%;
			height: 100%;
			opacity: 1;
		}
	}

	.title {
		font-size: $font-lg;
		color: $font-color-dark;
		line-height: 80upx;
	}

	.title2 {
		font-size: $font-sm;
		color: $font-color-light;
		line-height: 40upx;
		height: 80upx;
		overflow: hidden;
		text-overflow: ellipsis;
		display: block;
	}

	.price-box {
		display: flex;
		align-items: center;
		justify-content: space-between;
		padding-right: 10upx;
		font-size: 24upx;
		color: $font-color-light;
	}

	.price {
		font-size: $font-lg;
		color: $uni-color-primary;
		line-height: 1;

		&:before {
			content: '￥';
			font-size: 26upx;
		}
	}
}
</style>
